An interactive applet and associated web page that demonstrate the properties of a 30-60-90 triangle.
The applet shows a right triangle that can be resized by dragging any vertex.
As it is drag...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate the properties of a 3:4:5 triangle - one of the Pythagorean triples.
The applet shows a right triangle that can be resized by draggin...More: lessons, discussions, ratings, reviews,...

The program uses the HTML5 canvas (HTML5 canvas javascript API) and web workers. Mathematical calculations are performed using the web workers, and the results are drawn on the canvas surface. Applica...More: lessons, discussions, ratings, reviews,...

This allows students to explore 4 loci problems with a JavaSketchpad sketch: from 1 fixed point, from 1 fixed line, from 2 fixed points, and from 2 fixed lines. The students can manipulate the drawin...More: lessons, discussions, ratings, reviews,...

An interactive applet and associated web page that demonstrate the properties of a 45-45-90 isosceles right triangle.
The applet shows a right triangle that can be resized by dragging any vertex. ...More: lessons, discussions, ratings, reviews,...

Students create a sketch in which a dramatic animation shows how the sum of the areas of two squares is equal to the area of the third square. The link to the activity itself is to a zip file tha...More: lessons, discussions, ratings, reviews,...

Students create a sketch in which a dramatic animation shows how the sum of the areas of two squares is equal to the area of the third square. The link to the tool itself is to a zip file that co...More: lessons, discussions, ratings, reviews,...

A teaching unit on fractals for students and teachers in grades 4 to 8, that adults are free to enjoy, designed to introduce students to fractals and the underlying mathematics. It focuses on fractals...More: lessons, discussions, ratings, reviews,...

This PowerPoint presentation uses animation and color to show a step-by-step geometric proof of the Pythagorean Theorem. It is assumed that students are already familiar with the theorem and its mean...More: lessons, discussions, ratings, reviews,...

In this guided Geometer's Sketchpad exploration, students use their knowledge of tangent circles to discover a relationship between the radii of three circles which are mutually tangent to each other ...More: lessons, discussions, ratings, reviews,...

This is a free JAVA applet that helps users to study spatial geometry in a dynamic and interactive way. Using it, the user can rotate, zoom out, zoom in and translate a plethora of polyhedra. Moreover...More: lessons, discussions, ratings, reviews,...

A+ Click is an interactive collection of more than 500 mathematical problems based on school program for grades 1 to 12. It defines the personal level of math knowledge. You move up into the next lev...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.